NEW YORK (CBSNewYork) – As we celebrate George Washington’s birthday on this Presidents Day, CBS2’s Mary Calvi is dishing new details about the nation’s first president and his forgotten love story.

SEE IT: Mary Calvi Dishes About ‘Dear George, Dear Mary’ On CBSN New York 

Calvi’s new book, “Dear George, Dear Mary” hits stores this Wednesday.

It explores the relationship between George Washington and his first love, heiress Mary Philipse, one of the wealthiest women in colonial America.

Web Extra: Click here to read an excerpt from “Dear George, Dear Mary.”

Over the weekend, the story was featured on “CBS Sunday Morning.”

“In the 1800s, she’s written in every book there is that I could find about George Washington, and yet since then, I feel like she’s sort of been left out of history,” Calvi told correspondent Jim Axelrod.

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Calvi says her research shows British commanders may have come between Washington and Philipse, sparking the resentment that ultimately propelled him to the forefront of the American Revolution.

MORE: CBS2’s Mary Calvi Tours ‘George Washington’s New York’

“Every document was piecing together, and this gigantic puzzle of love, deception and vengeance just appeared. It was really incredible,” she said Monday morning.

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Calvi adds she hopes the book will inspire historians to review their relationship further.

“It’s been a fascinating undertaking,” she said.